package com.example.tests;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;

import com.thoughtworks.xstream.XStream;

public class ContactDataGenerator {

	public static void main(String[] args) throws IOException {
		if (args.length < 3) {
			System.out
					.println("Please specify parameters: <amount of test data> <file> <format> ");
			return;
		}
		int amount = Integer.parseInt(args[0]);
		File file = new File(args[1]);
		String format = args[2];

		if (file.exists()) {
			System.out.println("File " + file
					+ " is already exists, please, remove it manually");
			return;
		}

		List<ContactData> contacts = generateRandomContacts(amount);
		if ("csv".equals(format)) {
			saveContactsToCsvFile(contacts, file);
		} else if ("xml".equals(format)) {
			saveContactsToXmlFile(contacts, file);
		} else {
			System.out.println("Unknown format");
		}
	}

	private static void saveContactsToXmlFile(List<ContactData> contacts,
			File file) throws IOException {

		XStream xstream = new XStream();
		xstream.alias("contact", ContactData.class);
		String xml = xstream.toXML(contacts);
		FileWriter writer = new FileWriter(file);
		writer.write(xml);
		writer.close();
	}

	@SuppressWarnings("unchecked")
	public static List<ContactData> loadsContactsFromXmlFile(File file)
			throws IOException {
		XStream xstream = new XStream();
		xstream.alias("contact", ContactData.class);
		return (List<ContactData>) xstream.fromXML(file);
	}

	private static void saveContactsToCsvFile(List<ContactData> contacts,
			File file) throws IOException {
		FileWriter writer = new FileWriter(file);
		for (ContactData contact : contacts) {
			writer.write(contact.getFirstname() + "," + contact.getLastname()
					+ "," + contact.getAddress() + ","
					+ contact.getAddressdop() + "," + contact.getEmail() + ","
					+ contact.getEmail2() + "," + contact.getHometel() + ","
					+ contact.getMobiltel() + "," + contact.getPhone2() + ","
					+ contact.getWorktel() + "!\n");
		}
		writer.close();

	}

	public static List<ContactData> loadsContactsFromCsvFile(File file)
			throws IOException {
		List<ContactData> list = new ArrayList<ContactData>();
		FileReader reader = new FileReader(file);
		BufferedReader bufferedReader = new BufferedReader(reader);
		String line = bufferedReader.readLine();
		while (line != null) {
			String[] part = line.split(",");
			ContactData contact = new ContactData().withFirstname(part[0])
					.withLastname(part[1]).withAddress(part[2])
					.withAddressdop(part[3]).withEmail(part[4])
					.withEmail2(part[5]).withHometel(part[6])
					.withMobiltel(part[7]).withPhone2(part[8])
					.withWorktel(part[9]);
			list.add(contact);
			line = bufferedReader.readLine();
		}

		bufferedReader.close();
		return list;
	}

	public static List<ContactData> generateRandomContacts(int amount) {
		List<ContactData> list = new ArrayList<ContactData>();

		for (int i = 0; i < amount; i++) {
			ContactData contact = new ContactData()
					.withFirstname("firstname" + generationRandomString())
					.withLastname("lastname" + generationRandomString())
					.withAddress("address" + generationRandomString())
					.withAddressdop("addressdop" + generationRandomString())
					.withHometel("hometel" + generationRandomString())
					.withMobiltel("mobitel" + generationRandomString())
					.withWorktel("worktel" + generationRandomString())
					.withEmail("email" + generationRandomString())
					.withEmail2("email2" + generationRandomString())
					.withPhone2("phone2" + generationRandomString());
			list.add(contact);
		}
		return list;
	}

	public static String generationRandomString() {
		Random rnd = new Random();

		if (rnd.nextInt(3) == 0) {
			return "";
		} else {
			return "" + rnd.nextInt();
		}
	}

}
